[Ben M.]

Originally Posted by 455Grandville

6.9 & 7.3 IDI's are common and you can buy em for about the same price as a 6.2 GM from those years (usually pretty cheap)

Depends on where you live. Where I live, the 6.2 is rare but goes for peanuts. The 7.3 is more common, but the also costs a few grand more just because it's the 7.3. The 6.9 is a bit cheaper, but most of those trucks of that era have had the snot beat out of them.